Revert "fix: check type before using string-only method (#2393)"

This reverts commit 06f0e0c.

Author: pieh

.github/workflows/test-integration.yml

@@ -28,7 +28,7 @@ jobs:
         with:
           deno-version: v1.x
       - name: Install netlify-cli and npm
-        run: npm install -g netlify-cli npm@10.2.4
+        run: npm install -g netlify-cli npm
       - name: NPM Install
         run: npm install
       - name: Run integration tests

packages/runtime/src/templates/handlerUtils.ts

@@ -135,12 +135,10 @@ export const augmentFsModule = ({
 
   // ...then monkey-patch it to see if it's requesting a CDN file
   promises.readFile = (async (file, options) => {
-    // file argument can be a string, URL, etc - Next.js cache reading uses a string
-    // and that's only thing we really want to handle here, so we just do type checking
-    // instead of trying to handle all possible type before checking weather read
-    // is about page files.
-    if (typeof file === 'string' && file.startsWith(pageRoot)) {
-      const baseUrl = getBase()
+    const baseUrl = getBase()
+
+    // We only care about page files
+    if (file.startsWith(pageRoot)) {
       // We only want the part after `.next/server/`
       const filePath = file.slice(pageRoot.length + 1)